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Bassma M. Ali, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport, Abu-Qir, Alexandria, Egypt
Zainab Ali, Medical research institute, Alexandria University, Alexandria, Egypt
Elen Emad, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport, Abu-Qir, Alexandria, EgyptFollow
Ragaa Ahmed, Maritime Postgraduate Studies Institute, Arab Academy for Science, Technology and Maritime Transport, Abu-Qir, Alexandria, Egypt
Ayat Khasawneh, Water and Environmental Engineering Department, Al-Balqa' Applied University, P.O. Box 50, Al-Huson, 19117 Irbid, Jordan
Khalideh Al bkoor Alrawashdeh, Mechanical Engineering Department, Al-Huson University College, Al-Balqa' Applied University, P.O. Box 50, Al-Huson, 19117 Irbid, Jordan
Rebhi A. Damseh, Mechanical Engineering Department, Al-Huson University College, Al-Balqa' Applied University, P.O. Box 50, Al-Huson, 19117 Irbid, Jordan
Jalal A. Al-Tabbal, Department of Applied Science, Al-Huson University College Al-Balqa Applied University, Al-Huson, Jordan
Kamel K. Al-Zboon, Water and Environmental Engineering Department, Al-Balqa' Applied University, P.O. Box 50, Al-Huson, 19117 Irbid, Jordan
Petros Samaras, Department of Food Science and Technology, International Hellenic University, 57400 Thessaloniki, Greece
Yasser Dessouky, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Abu-Qir, Alexandria, Egypt
Kareem Tonbol, College of Maritime Transport and Technology, Arab Academy for Science, Technology and Maritime Transport, Abu-Qir, Alexandria, Egypt

Article Type

Research Article

Subject Area

Environmental Pollution

Abstract

This study used adsorbent hydrogel beads on chitosan coated with the commercially prepared metal-organic framework (MOF) and its aminated derivative to chromium (VI) ions from their aqueous solutions. Higher removal (%) and higher adsorption capacity values were recorded using chitosan and its aminated derivatives, UiO-66-NH2 (Zr) (0.5 % CS) adsorbent (87 % and 95 mgg-1), respectively, compared with those using CS adsorbent (86% and 93 mg/g using 1% CS); contact time was 180 min, with maximum removal (%) reaching 87% and maximum adsorption capacity of 95 mgg-1. The pH of the studied medium was in the range of 1–8. It was found that the maximum values of removal (%) and adsorption capacity values were observed at pH 2, and the Cr (VI) concentration was studied in the range of 10–200 ppm. The highest removal (%) was about 100 % using 10 and 25 ppm of Cr (VI), while the maximum adsorption capacity was found to be 132 mgg-1 and was recorded using 200 ppm of Cr (VI). Adsorption experiments at 150 rpm were conducted to record maximum adsorption capacity and higher removal (%) values. The developed adsorbent demonstrated good adsorption properties, with removal exceeding 60 % after six cycles and a maximum capacity of 52 mgg-1. In conclusion, the MOF/chitosan adsorbent beads have the potential to be a novel and effective large-scale adsorbent for the removal of hazardous Cr (VI) ions from industrial effluent.

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